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Verified Remediation

Mold remediation · Madison, Wisconsin

Keystone Environmental LLC

Verified Pro - Identity Verified
Rated 5.0 out of 5, 18 Google reviews
Call for an estimate
(608) 480-8822
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Website

keystone-env.com

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Verification record

How We Verify Wisconsin Pros

We don't hold Wisconsin mold license records, so we verify Wisconsin pros directly: business identity, location, and reputation, plus insurance and industry certifications when provided.

Business identity and location
Verified · Madison, WI
Google rating
5.0 out of 5 from 18 Google reviews
Industry certifications
None on file yet
Insurance
No current certificate of insurance on file
State license
Not applicable (Wisconsin has no mold-specific license)
Read our trust standards

Regulatory facts last reviewed September 2026.

Review strength

Community Feedback

Solid

5.0 from 18 Google reviews

  1. Mixed

    Under 4.0

  2. Solid (this company)

    4.0 or higher

  3. Strong

    4.5 or higher, 20+ reviews

Fewer than 10 Google reviews reads as Limited: too few to judge.

Google rating

The top rating among the 264 rated Wisconsin pros we list, shared with 105 others.

The middle half are rated 4.6 to 5.0.

Review count

More reviews than 107 of the 264 rated Wisconsin pros we list.

The middle half have 7 to 98 reviews.

Ratings and review counts come from Google. Businesses can't edit them here; an owner can only refresh them from Google.

Business details

Location

Address
171 S Fair Oaks Ave Suite 450, Madison, WI 53704
Get directions

The work

Remediation Capabilities

What mold remediation professionals do

  • Structural Containment

    Isolation of affected areas to help minimize cross-contamination

  • Negative Air Pressure Setup

    Lower air pressure in the work area to help control the spread of contamination

  • Microbial Remediation

    Physical removal of mold growth from surfaces

  • HEPA Filtration Protocols

    Air scrubbing and filtration during remediation

What this service involves

Mold Remediation

Mold remediation typically includes containment suited to the job, HEPA air filtration, and cleaning or removal of affected materials. Where the job calls for a check of the finished work by someone else, it should be done by the original assessor or another independent professional, not the company that did the work.

About

About Keystone Environmental LLC

Serving Madison, WI, Keystone Environmental LLC is a verified mold professional specializing in removal and remediation. Highly rated at 5.0/5.0 based on 18 customer reviews.

Guides

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More cities

Also Serving Wisconsin

Find verified mold professionals in nearby cities

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Madison, Wisconsin

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Every listing is identity-checked, with state licenses, insurance, and reviews verified where available.